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Bandtail Limits to Solar Conversion Efficiencies in Amorphous Silicon Solar Cells

Published online by Cambridge University Press:  01 February 2011

K. Zhu ,
J. Yang ,
W. Wang ,
E. A. Schiff ,
J. Liang  and
S. Guha
K. Zhu
Affiliation:
Department of Physics, Syracuse University, Syracuse, NY 13244-1130
J. Yang
Affiliation:
United Solar Systems Corp., 1100 West Maple Rd., Troy, MI 48084
W. Wang
Affiliation:
Department of Physics, Syracuse University, Syracuse, NY 13244-1130
E. A. Schiff*
Affiliation:
Department of Physics, Syracuse University, Syracuse, NY 13244-1130
J. Liang
Affiliation:
Department of Physics, Syracuse University, Syracuse, NY 13244-1130
S. Guha
Affiliation:
United Solar Systems Corp., 1100 West Maple Rd., Troy, MI 48084
*
*corresponding author; easchiff@syr.edu
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Abstract

We describe a model for a-Si:H based pin solar cells derived primarily from valence bandtail properties. We show how hole drift-mobility measurements and measurements of the temperature-dependence of the open-circuit voltage VOC can be used to estimate the parameters, and we present VOC(T) measurements. We compared the power density under solar illumination calculated with this model with published results for as-deposited a-Si:H solar cells. The agreement is within 4% for a range of thicknesses, suggesting that the power from as-deposited cells is close to the bandtail limit.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 762: Symposium A – Amorphous and Nanocrystalline Silicon-Based Films – 2003 , 2003 , A3.2
Copyright
Copyright © Materials Research Society 2003

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References

1. Guha, S., in Technology and Applications of Amorphous Silicon, edited by Street, R. A. (Springer, Berlin, 1999), pp. 252–305.Google Scholar
2.The bandtail density-of-states evaluated at the valence bandedge gv0 ≡ g(Ev) is also required by some modeling programs such as AMPS 1D. The relationship to NV is [7]: This relationship is valid only for kT < ΔEV .Google Scholar
3. Dinca, S., Ganguly, G., Lu, Z., Schiff, E. A., Vasilios, V., Wronski, C. R., Yuan, Q., in Amorphous and Nanocrystalline Silicon-Based Films, edited by Abelson, J. R., et al. (Materials Research Society, Symposium Proceedings Vol. 762, Pittsburgh, 2003), in press.Google Scholar
4. Gu, Q., Wang, Q., Schiff, E. A., Li, Y.-M., and Malone, C. T., J. Appl. Phys. 76, 2314 (1994).Google Scholar
5. Juska, G., Kocka, J., Viliunas, M., and Arlauskas, K., J. Non-Cryst. Solids 164-166, 579 (1993).Google Scholar
6. Stradins, P., Fritzsche, H., Tzanetakis, P., and Kopidakis, N., in Amorphous Silicon Technology - 1996, edited by Hack, M., et al (Materials Research Society Symposium Proceedings Vol. 420, Pittsburgh, 1996), p. 729.Google Scholar
7. Schiff, E. A., Solar Energy Materials and Solar Cells, in press. Google Scholar
8. Cody, G. D., Tiedje, T., Abeles, B., Brooks, B., and Goldstein, Y., Phys. Rev. Lett. 47, 1480 (1982).Google Scholar
9. Jackson, W. B., Kelso, S. M., Tsai, C. C., Allen, J. W., and Oh, S.-J., Phys. Rev. B 31, 5187 (1985).Google Scholar